XML 108 R95.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Shareholders' Equity and Long-Term Incentive Compensation - Long-Term Incentive Compensation (Details) $ in Millions |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 22, 2018 | Mar. 01, 2017 | Mar. 02, 2016 | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Assumptions in determining the fair value of awards granted |  |  |  |  |  |
Historical period upon which annual expected stock price volatility is based |  |  |  | 3 years |  |
Maximum |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Maximum period over which the fair value of restricted stock shares and restricted stock units are amortized |  |  |  | 3 years |  |
Assumptions in determining the fair value of awards granted |  |  |  |  |  |
Daily treasury yield curve period upon which average risk-free interest rate is based |  |  |  | 3 years |  |
Maximum | 2002 Stock Compensation Plan |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Shares available for grant (in shares) |  |  |  | 1,683,000 |  |
Maximum | Directors' Plan |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Shares available for grant (in shares) |  |  |  | 27,000.000 |  |
Minimum |  |  |  |  |  |
Assumptions in determining the fair value of awards granted |  |  |  |  |  |
Daily treasury yield curve period upon which average risk-free interest rate is based |  |  |  | 1 year |  |
PSU's, RSU's, RS's, and Stock Options |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Compensation expense | $ |  |  |  | $ 11.6 | $ 12.0 | $ 12.7
PSU's, RSU's, and RS's | Maximum |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  |
PSU's, RSU's, and RS's | Minimum |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Vesting period |  |  |  | 1 year |  |
Restricted stock shares and restricted stock units |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Related tax benefit | $ |  |  |  | $ 2.8 | 4.6 | $ 4.8
Restricted stock shares and restricted stock units | 2002 Stock Compensation Plan |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Reduction of shares available for grant (in shares) |  |  |  | 2 |  |
Restricted stock shares and restricted stock units | Directors' Plan |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Vesting period |  |  |  | 1 year |  |
PSU's |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  | 3 years
Assumptions in determining the fair value of awards granted |  |  |  |  |  |
Annual expected stock price volatility | 42.25% | 41.03% | 36.91% |  |  |
Annual expected dividend yield | 0.00% | 0.00% | 0.00% |  |  |
Risk-free interest rate | 2.38% | 1.52% | 0.97% |  |  |
Correlation between total shareholder return for SPX and the applicable S&P index | 0.3267 | 0.3685 | 0.3354 |  |  |
PSU's | 2002 Stock Compensation Plan |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Reduction of shares available for grant (in shares) |  |  |  | 3.0 |  |
PSU's | S&P Composite 1500 Industrials Index |  |  |  |  |  |
Assumptions in determining the fair value of awards granted |  |  |  |  |  |
Annual expected stock price volatility | 34.99% | 34.49% | 32.94% |  |  |
Risk-free interest rate | 2.38% | 1.52% | 0.97% |  |  |
PSU's | Maximum |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Maximum vesting attainment (percentage) |  |  |  | 150.00% |  |
Long Term Cash Awards |  |  |  |  |  |
Stock-based Compensation |  |  |  |  |  |
Vesting period |  |  |  | 3 years |  |
Compensation expense | $ |  |  |  | $ 3.9 | $ 3.8 | $ 1.0

X
- Definition The maximum period over which the fair value of restricted stock and restricted stock units are amortized. + References No definition available. + Details
Name: | spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAmortizationPeriod
Namespace Prefix: | spxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The historical period upon which annual expected stock price volatility is based. + References No definition available. + Details
Name: | spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityPeriodBasedOnHistoricalVolatility
Namespace Prefix: | spxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the daily treasury yield curve period, in years, upon which the average risk-free interest rate is based. + References No definition available. + Details
Name: | spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateCalculationPeriod
Namespace Prefix: | spxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the assumed correlation between the total shareholder return for the entities stock and the S&P 500 Composite Index and the S&P Composite 1500 Industrials Index. + References No definition available. + Details
Name: | spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsTotalShareholderReturnCorrelation
Namespace Prefix: | spxc_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount by which common stock available is reduced for each share granted. + References No definition available. + Details
Name: | spxc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreaseDecrease
Namespace Prefix: | spxc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=spxc_StockCompensationPlan2002Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=spxc_NonEmployeeDirectorIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=spxc_PerformanceSharesRestrictedStockRestrictedStockUnitsandEmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=spxc_PerformanceSharesRestrictedStockandRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=spxc_RestrictedStockAndRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | spxc_IndexTypeAxis=spxc_SP600CapitalGoodsIndexMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=spxc_LongTermCashAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |